Ignoring Modric, even some above average CM like Rakitic is still playing at a very high level for Sevilla.
Heck, that day I just saw Joaquin come on for Betis at almost 42 years old.
Fabregas is not only playing at a low level, but is also struggling to buy a start for them. Ozil similarly can't get a game in Turkish league at the age of 34.